| Morkoka | |
| Source1 Coordinates: | 66.6742°N 108.4811°W |
| Mouth: | Markha |
| Mouth Coordinates: | 65.1759°N 115.8563°W |
| Progression: | Markha→ |
| Subdivision Type1: | Country |
| Length: | 841km (523miles) |
| Basin Size: | 32400km2 |
The Morkoka (ru|Моркока; sah|Моркуока, Morkuoka) is a river in Sakha Republic, Russia. It is a right tributary of the Markha. It has a length of 841km (523miles), and it has a basin size of 32400km2. The river sources from Lake Bayyttakh and travels through the Vilyuy Plateau.[1]